I think they know things, too. I had to confine Squeak to the bedroom while someone worked on my stove Tuesday, and I'm here to tell you she DID NOT like it!! She knocked the dish off the dresser that contains my earrings, knocked over picture frames, knocked over a small trunk that sits in the floor, Pulled her towel from the bed onto the floor, AND kicked cat litter everywhere! She has never done this before, BUT she hasn't had to be shut up since Ellie died. I definitely think they get mad when we leave. Have fun on your trip! I'm sure Miss Luna will be fine with the people who are caring for her.